Tax Receivable Agreements (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Apr. 15, 2015	Mar. 31, 2017	Dec. 31, 2015	Jun. 30, 2017	Feb. 28, 2017	Dec. 31, 2016
Tax Receivable Agreements
Payment on applicable cash tax savings (as a percent)	85.00%
First payment due after filing of company's tax return			120 days
First payment made		$ 7,000
Deferred tax assets related to exchange of units	$ 218,400
Payments to certain Virtu Members	238,600
Minimum tax receivable agreement obligation over the agreed period	400
Maximum tax receivable agreement obligation over the agreed period	$ 21,400
Period over which the obligations are to be settled	15 years
Reduction of paid-in capital for the difference between TRA liability and related deferred tax asset.	$ 20,200
Deferred tax asset recorded in connection with a stock offering					$ 8,500
Amount of payment liability pursuant to tax receivable agreements					7,300
Increase in additional paid-in capital related to tax receivable agreements					$ 1,200
Deferred tax assets				$ 186,600		$ 189,600
Tax receivable agreement obligations				$ 231,639		$ 231,404